This has to have been done before somewhere by someone. A paper pad mousepad doesn’t take a lot to put together, after all. However, to be fair (and slightly contradictory) I am a fan of Rhodia notepads, so it’s awfully tempting to snap one of these up for myself. The lovely grid pad combined with the appropriately sized mousepad makes one less thing on the workspace surface (and that’s never a bad thing).

Use the note pad as a mouse pad, write notes on it while you use it. When you want to have a clean slate, just tear off the top sheet and start fresh.
There are 30 sheets of graph paper, with a grid size of 25 squares per square inch (quadrille 5/5 mm square).